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WD 20TB Ultrastar DC HC560 7200 rpm SATA III 3.5" Internal HDD

BH #WE0F38785 • MFR #0F38785
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WD 20TB Ultrastar DC HC560 7200 rpm SATA III 3.5" Internal HDD
Key Features
  • 20TB Storage Capacity
  • 3.5" Form Factor
  • SATA III 6 Gb/s Interface
  • 512MB Cache
The 20TB Ultrastar DC HC560 7200 rpm SATA III 3.5" Internal HDD from Western Digital is a high performance, large capacity drive designed for cloud and hyperscale storage, massive scale-out (MSO), high-density data centers, distributed file systems, bulk storage, big data analytics, and other demanding tasks that require 24/7 operation. This 7200 rpm drive utilizes the SATA III 6 Gb/s interface for data transfer rates of up to 291 MB/s. Moreover, as a professional-grade drive, it has an MTBF rating of 2.5 million hours, 600,000 load/unload cycles, an annualized failure rate of 0.35%, and a workload rating of up to 550TB per year.
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WD DC HC560 Internal HDD Overview

The 20TB Ultrastar DC HC560 7200 rpm SATA III 3.5" Internal HDD from Western Digital is a high performance, large capacity drive designed for cloud and hyperscale storage, massive scale-out (MSO), high-density data centers, distributed file systems, bulk storage, big data analytics, and other demanding tasks that require 24/7 operation. This 7200 rpm drive utilizes the SATA III 6 Gb/s interface for data transfer rates of up to 291 MB/s. Moreover, as a professional-grade drive, it has an MTBF rating of 2.5 million hours, 600,000 load/unload cycles, an annualized failure rate of 0.35%, and a workload rating of up to 550TB per year.

Highlights
  • 20TB capacity in a standard 3.5" format
  • ePMR & CMR technology works with all capacity enterprise applications & environments
  • OptiNAND for highest capacities
  • Reliable, field-proven, 7th generation HelioSeal design delivers outstanding power efficiency
  • HDD technologies, such as OptiNAND, EAMR, TSA, and HelioSeal
  • 2.5 million hour MTBF (projected) and a limited 5-year warranty
  • Self-encrypting drive (SED) options
Applications
  • Cloud and hyperscale storage
  • Massive scale-out (MSO), high-density data centers
  • Distributed file systems
  • Bulk storage using object storage solutions like Ceph and OpenStack Swift
  • Primary and secondary storage for Apache Hadoop for big data analytics
Reimagining the HDD for Exponential Data Growth
Hyperscale cloud, CSPs, enterprises, smart video surveillance partners, NAS suppliers, and more need storage solutions to meet the exponential growth in data creation. When it comes to cost-effective storage of data at scale, hard disk drives (HDDs) continue to play a central role. HDDs deliver the capacity, performance, and reliability needed to store vast amounts of data today and well into the future. Investments in HDD technology remain critical to supporting worldwide data growth.

Western Digital has developed flash-enhanced drives with OptiNAND technology by vertically integrating their NAND flash with their HDDs. Western Digital HDDs have been leaders in areal density with technologies of energy-assisted magnetic recording technology (EAMR), triple-stage actuator (TSA), HelioSeal, and now OptiNAND technology. Higher areal density means higher capacities to meet storage challenges.
20TB HDDs with OptiNAND Technology
OptiNAND integrates an iNAND Universal Flash Storage (UFS) Embedded Flash Drive (EFD) with traditional spinning disk media, and incorporates innovative changes to the firmware algorithm and system-on-a-chip (SoC). OptiNAND is not a hybrid technology. The drive works smarter, with enhanced firmware algorithms taking advantage of expanded metadata that has been offloaded to the iNAND, enabling more tracks per inch (TPI) with resulting increased areal density.

The Ultrastar DC HC560, with the first implementation of OptiNAND technology's capacity-enabling features, delivers a 20TB capacity in a nine-disk platform (2.2TB/platter) with the CMR recording format.
Trusted Reliability and Quality for Data at Scale
The Ultrastar DC HC560 meets modern data center reliability requirements with 2.5 million hour MTBF (projected) and a limited 5-year warranty. It offers security and encryption options to help protect data from unauthorized use, including SED models.

WD DC HC560 Internal HDD Specs

Key Specs
Total Installed Storage
20 TB
Drive Type
SATA III / 3.5" HDD (7200 rpm)
Read Speed
Sustained: 291 MB/s
Random: 212 IOPS
Write Speed
Sustained: 291 MB/s
Random: 494 IOPS
Drive Type
SATA III / 3.5" HDD (7200 rpm)
Read Speed
Sustained: 291 MB/s
Random: 212 IOPS
Write Speed
Sustained: 291 MB/s
Random: 494 IOPS
Encryption Support
No
Mean Time Between Failures (MTBF)
2.5 Million Hours
Endurance (Total Bytes Written)
550 TB
Power Draw
7.0 W (Active)
6.1 W (Idle)
General
Operating Conditions
41 to 140°F / 5 to 60°C 
Operating Shock
50 G / 2.0 ms
Storage Conditions
-40 to 158°F / -40 to 70°C 
Dimensions
5.8 x 4 x 1" / 147 x 101.6 x 26.1 mm
Weight
24.3 oz / 690 g
Packaging Info
Package Weight
1.7 lb
Box Dimensions (LxWxH)
6.6 x 5.8 x 2.3"

WD DC HC560 Internal HDD Reviews

Excellent!

By Saul
Rated 5 out of 5
Date: 2025-03-15

I have a few of these now and this one is working exactly as the others I bought directly from WD. I had originally bought a new one from Amazon but when it arrived it was grey market and had no warranty so I returned it and bought from B&H, showed up two days later FULL warranty and cost THE SAME AMOUNT. so awesome! totally will buy more drives from B&H in the future.

They run great

By Preston
Rated 5 out of 5
Date: 2024-10-29

I have about 30 of these running in Synology devices. All formatted to 4Kn sector sizes. They run fantastic, never a hiccup with any of them. Will buy more.

See any errors on this page?

Does this work with WD My Cloud Expert Series EX2 ...

Does this work with WD My Cloud Expert Series EX2 Ultra 2-Bay NAS Server?
Asked by: Aditya
Yes, the WD 20TB Ultrastar DC HC560 could be used with the WD My Cloud Expert Series EX2 Ultra 2-Bay NAS Server.
Answered by: Calvin M
Date published: 2024-07-11

Is this a Western Digital or a Seagate product? ...

Is this a Western Digital or a Seagate product? The product title and description have conflicting information.
Asked by: Ashley
The WD 20TB Ultrastar DC HC560 7200 rpm SATA III 3.5" Internal HDD is made by Western Digital.
Answered by: Paige K
Date published: 2024-07-11

Is this Retail packaging..? And am I correct the ...

Is this Retail packaging..? And am I correct the model number indicates this is the later 'B' Gen version of the drive...?
Asked by: Steven
The WD 20TB Ultrastar DC HC560 7200 rpm SATA III 3.5" Internal HDD BH #WE0F38785 is a Enterprise grade drive. These are all OEM / whitebox as they are intended for professional installation in datacenters.
Answered by: Reuben K
Date published: 2024-07-11

These drives show oem and used. Do they just show ...

These drives show oem and used. Do they just show used because they are OEM and they are new drives with no warranty from WD?
Asked by: Jay
The WD 20TB Ultrastar DC HC560 7200 rpm SAS Internal HDD (OEM), B&H # WE0F38652, is a new OEM drive; it has not been used before, and it includes a 5-year warranty with WD. The button that reads “used from” on the product's page points to a used model of the same drive; it does not mean this one is used.
Answered by: Michael S
Date published: 2024-08-29

Would these work inside the OWC Gemini enclosure ...

Would these work inside the OWC Gemini enclosure (2 bay)?
Asked by: Kent
The OWC Gemini 2-Bay Thunderbolt 3 Raid Enclosure, B&H # OWCTB3GM000, supports 3.5'' SATA III hard drives; the WD 20TB Ultrastar DC HC560 7200 rpm SAS Internal HDD (OEM), B&H # WE0F38652, is a SAS drive and is not compatible.
Answered by: Elliot A
Date published: 2025-01-28
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